Hocus was an old cunning attorney. The words of consecration, "Hoc est corpus," were travestied into a nickname for jugglery, as "Hocus-pocus." - John Richard Green, A Short History of the English People, 1874. see Charles Macklin.
The Reader may here observe the Force of Numbers, which can be successfully applied, even to those things, which one would imagine are subject to no Rules. There are very few things which we know, which are not capable of being reduc'd to a Mathematical Reasoning; and when they cannot it's a sign our knowledge of them is very small and confus'd; and when a Mathematical Reasoning can be had it's as great a folly to make use of any other, as to grope for a thing in the dark, when you have a Candle standing by you.